Wi-linktech Communication Technologies (Shanghai) Co.,Ltd WLT8761M dual mode Bluetooth module RTL 8761 BR/EDR/LE MVsilicon BM5064 Spec V1.1 2019-06-01 www.wi-linktech.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd Index 1 Summary.......................................................................................................................................... 3 1.1 Functions............................................................................................................................... 3 1.2 Application Field....................................................................................................................
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 1 Summary WLT8761M is a dual mode Bluetooth module, support for all Bluetooth profiles and BLE profiles. WLT8761M is based on RTL 8761. It is a Bluetooth BR/EDR/BLE single chip solution. RTL8761 has best-in-class RF performance (TX power, RX sensitivity, blocking) and advanced power management for very low-power applications. WLT8761M has a high efficiency audio SOC inside.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 2 Electrical characters 2.1 Basic characters Absolute Maximum Ratings Min Max Unit Power supply Voltage (LDOIN) –0.5 +5.5 V Voltage of I/O pins –0.5 +3.6 V Storage Temperature –55 +125 °C Table 1. Absolute Maximum Ratings Recommended Operating Conditions Min TYP Max Unit Power supply Voltage (LDOIN) 3.35 4.2 5.0 V 0 3.3 3.6 V -20 25 75 °C Voltage of I/O pins Operating Temperature Table 2.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 2.3 Audio performance Parameter Test conditions Min Type Max Unit No filter 88(L)/88(R) dB 20KHz filter 92(L)/92(R) dB THD+N Peak -72(L)/-72(R ) dB Stereo Isolation IPad as Player 80 dB Signal-to-Noise Ratio Table 6. Audio performance 3 Hardware Description 3.1 Module size and Pin assignment 2019-06-01 www.wi-linktech.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd Figure 2. WLT8761M module size 2019-06-01 www.wi-linktech.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 4 PCB Design and RF Layout 4.1 Example Board Layout Figure 4. Footprint dimensions 4.2 PCB Layout Guide Bluetooth works in a frequency of 2.4GHz, the design of PCB and Mechanical should be careful to avoid the impact of various factors on the RF performance. Please note the following: 1. Outer casing surrounding WLT8761M module should avoid using metal materials. If the casing is metal, it is recommended to use an external 2.4GHz antenna. 2.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 3. Module should be placed on the edge of motherboard, ensure the antenna towards outside. Please make sure that all layers have no trace or copper under the Antenna region. 5 Recommended Reflow Profile(Number of Times : ≤2 times) Parameter setting of reflow soldering can refer to the following requirements ： Figure 5.
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd 6. Storage 1. Calculated shelf life in sealed bag： 12 months at <40℃ and <90% relative humidity(RH). 2. After bag is opened , devices that will be subjected to reflow solder or other high temperature process must be: 1). Check the humidity card :Normal at ≦ 30%RH. If :30%~40%(pink) or greater than 40%(red),labeling module has moisture absorption. Module require bake before mounting. 2). Mounted within 168 hours of factory conditions <30℃/60%RH.
Regulatory Module Integration Instructions List of applicable FCC rules This device complies with part 15.247 of the FCC Rules. Summarize the specific operational use conditions This module can be applied in wireless POS, sports and fitness sensors , health sensors, mobile accessories as well as smart home. The input voltage to the module should be nominally 3.35-5.0 V DC ，typical value 4.2V DC and the ambient temperature of the module should not exceed 75℃.
with the other transmitters， digital circuitry， or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance.
cases ， this would need to enable activity on the communication BUS (i.e.， PCIe， SDIO ， USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4， ANSI C63.10 and ANSI C63.26 for further general testing details.
